>Correction;
>
>Installing Norton will not slow down a properly configured maintained
>computer.

Re-correction,

It will. This applies to all resident AV. They differ by the degree by
which they slow them down though.

>( I have a network of over 200 computers of various makes, models and
>vintage. Norton is on all of them. None of them are slowed down by
>Norton...but then again I know how to maintain a healthy system).

Are you saying if you benchmarked a PC with against one without
antivirus that there would be 'NO' difference in the performance? It
would appear so.